Patent GB-190517439-A (GB)
Title: Improvements in or relating to Machines for Forming and Inserting Staples and like Fasteners.
Inventor: BOUELT ALFRED JULIUS
Filed: 1905-08-29
Granted: 1906-08-23
Abstract: 17,439. Boult, A. J., [United Shoe Machinery Co.]. Aug. 29. Stapling.-A machine for forming and inserting wire staples of adjustable length is provided with means for ensuring that staples formed successively are of uniform length, and that the legs of each staple are of the same length: The wire w is drawn from a reel and fed over the die 30, Fig. 5, on which a severed piece is bent by the die 32, actuated by an arm 60, Fig. 1, fastened to the rock-shaft 50, having a forked end 62 embracing the block 64 pivoted to the slide 66 which carries the die 32. The die 30 is moved aside, when the driver 18 descends, by means of a carriage sliding on the shaft 50 and operated by a cam. The driver 18 works in a groove 35 in the block 33, and drives the staple through the throat 13 into the work. To vary the length of staple, the feedroller 90 and cutting-mechanism are carried by a sliding carrier 70, and to ensure that the middle of the severed piece of wire lies over the die 30, the feeding-mechanism is controlled by the position of the carrier 70. The wire is cut by the stationary knife 80, clamped to the carrier 70 by the plate 81, and the movable knife 82 fastened to the bar 84, having a hook-shaped end 85 engaging an L-shaped piece 86 on the bar 87, carrying rollers 88, 89 engaged by a cam 12 on the main shaft 6. The bar 84 is able to move laterally with the carrier 70. The feed-roller 90 is mounted on the end of a shaft 91 supported in the carrier 70, and has a corrugated groove in which the wire is held by an idle roller 92, mounted on the bar 93 pivoted by the bolt 91 to the carrier 70 and pulled upwards by the spring 96. During the backward movement of the roller 90, the idle roller 92 is depressed by the plunger 75, engaged by the lower end of the bar 84 and acting on the adjustable stop 76 in the bar 93, backward movement of the wire being prevented by the check roller 113 mounted in the tapered slot 115 in the guide 117. The feed-roller 90 is oscillated positively in both directions by means of a toothed wheel on the shaft 91 engaged by a toothed segment on the lever 100, which is pivoted on a stud 101 in the carrier 70, and has a slot 104 engaged by the roller 105 on the arm 106, fastened to the rock-shaft 107 having a second arm actuated by a cam on the shaft 6. With this arrangement, the extent of the oscillation of the roller 90 and the length of the wire fed depends upon the position of the carrier 70. The link 120, Fig. 12, fastened to the carrier 70 is provided with a roller 122 engaging a cam-groove in the plate 124, pivoted on the stud 125 and provided with a pivoted handle 127 for adjusting the position of the carrier 70. Accidental movement of the plate 124 is prevented by the spring-pressed dog 140 engaging teeth 142. Adjustable stops 130, 131, 132, 133 are provide so that the plate may be quickly moved to the correct positions for desired lengths of staple. The stops 130, 131 are placed over the stops 132, 133, and are engaged by a projection 145 when the handle is swung upwards on its pivot.